Influences of Structure on Properties

When he interviewed with Meyer in 1926, Mark outlined a typically thorough program. He proposed a team of organic and physical chemists, and physicists who would evaluate the influence of structure on properties such as rigidity, elasticity, melting point, and water absorption. Work, he proposed, would shift toward new material development and into the manufacturing facilities to evaluate the effects of processing... 

As mentioned above, properties of a material are influenced by that material s structure, which in turn is influenced by the material s processing. To complete the circular discussion, processing methods used for a material are often dictated by the material properties. Processing or fabrication methods and their influence on materials constitute the bulk of this chapter. A brief discussion of the influence of structure on properties will help put these effects into perspective. 

PAn s formed by both the chemical and electrochemical processes have been extensively studied to establish structure-property relationships. In this section, the structural studies of PAn are reviewed the influence of structure on properties is considered in Chapter 5. The description of PAn structure is complicated by its complexity. As described earlier, PAn can exist in six different forms (the salt or base forms of leucoemeraldine, emeraldine, and pemigraniline). In addition, the proton-ated forms of PAn also have counteranions intimately associated with the positively charged PAn chains. Finally, it has also been observed that PAn s may contain considerable amounts of solvent molecules. 

In this section, the structural studies of polythiophenes are reviewed the influence of structure on properties is considered in subsequent sections. The description of polythiophene structures include the alkyl-substituted thiophenes, such as poly(3-alkylthiophenes) (P3ATh s). 

Phase Structure of Block Polymers Influence of Structure on Properties Bulk Properties Melt Properties Solution Properties Commercial Block Polymers Applications of Block Polymers Mechanical Goods... 

Influence of Structure on Properties. The characteristic behavior of block polymers may be thought of as a combination of properties arising from three distinct aspects of the phase structure individual phases, heterophase structure, and interfacial regions. 

Meta-Connectivity—Influence of Structure on Molecular Wire Properties... 

Mateusz Wielopolski, Carmen Atienza, Timothy Clark, Dirk M. Guldi, Nazario Martin. p-Phenyleneethynylene Molecular Wires Influence of Structure on Photoinduced Electron-Transfer Properties. Chem. Eur. J. 2008, 14, 6379. 

The formation of 3D Me phase takes place under these conditions on a modified substrate surface. In this section, the influences of structure and properties of 2D Me UPD phases on the subsequent nucleation and growth processes of a 3D Me bulk phase are treated. 

Atom uniqueness or redundancy is certainly a shape attribute that must play some role in the influence of structure on function. One approach to the quantitation of uniqueness is the use of the Shannon equation for information content,which has been studied quite thoroughly by Brillouin and Bon-chev. " Kier has made use of the equation to encode molecular uniqueness, or negentropy, and to relate to biological and physical properties. 

The basic function of food proteins is to keep us alive and healthy. The importance of the quality of proteins for food and medical uses was recognized many years ago. However, the meaning of protein quality [1] has been a subject of great polemic ever since. Much remains to be learned for the understanding of the role of proteins in food. Knowledge of the influence of structure on functional properties and biological activities of proteins is essential for their rational use in foods and for the improvement of the safety of food proteins. 

Zhang, G.Z. Influence of Solvents on Properties, Structures, and Crystallization of Pharmaceutical Solids. Ph.D. thesis. Department of Pharmaceutics, University of Minnesota, Minneapolis, 1998, pp. 70-122. 

Because the stmctures of TPEs are diverse, the influence of structure on mechanical properties may not be universal for all materials. Nevertheless,... 

In the last chapter, the formal description of linear elasticity was introduced. It was shown that knowledge of the elastic constants for a particular material allows one to describe the strains produced by any arbitrary state of stress. In materials science one is often interested in controlling a material property and, thus, this chapter is concerned with the influence of structure on the elastic constants. At the most basic level, the elastic constants reflect the ease of deformation of the atomic bonds but it will be shown that other levels of structure can be very important, especially with the use of composite materials. 

This paper describes a feasibility study into the technique of using very low temperatures to convert simple, low viscosity liquids into lubricants and thus systematically Investigate the influence of structure on elastohydrodynamic (EHD) properties. 

The theme of the twelve chapters which comprise this book is information which can be used for designing a fibre composite article or structure. The data cover a wide range. There is information on the short- and long-term thermomechanical and electrical properties and behaviour of fibre-reinforced polymer composites, plus their response to fire and environmental effects. Finally the influence of processing on properties and the quality assurance of the final product are also considered. 

K.C. Mills, The influence of structure on the physico-chemical properties of slags ISIJInt, 33(1993), 148-155... 

The constant advancement of supercomputer technology currently allows one to apply the same levels of computational methodology to DNA basis, which four or five years ago were possible only for small model compounds. Indeed, this possibility has opened a new way of investigations of the various properties of the DNA fragments, because now the system of interest can be extended and directly related to the DNA base or even the whole nucleotide. So, one may not only study the tendencies which were predicted during the investigations of the model molecules, but also may see the variations related to the differences in the structures of various DNA bases. Below we review the available literature on the influence of hydration on properties of the DNA bases. We restricted the review primarily to the results of the supermolecular approximations because the studies performed in the framework of the several continuum models are covered in the contributions of Orozco et al. [118]. 

The concept of a structure-reactivity relationship implies that changes in structure should be quantitatively reflected in some measurable reactivity parameters associated with the molecule. For metal complexes, the capacity of the ligand structure to influence chemical properties is measurable in terms of reactivity parameters such as stability constants, rates of ligand dissociation, and reduction potentials. The influence of structure on chemical reactivity can often be rationalized in terms of steric and electronic components. MM calculations can be used to quantify the steric components present in the system. For metal complexes with series of ligands in which electronic effects are relatively constant (same number and type of donor atoms), reactivity differences can be attributed primarily to steric effects. In such cases, MM calculations have been used to obtain correlations between structure and reactivity. 

The present investigation deals with the stress state of the SijN. -TiN-MgO system and with the influence of structure on physico-mechanical properties of the material. 

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